would like information on lst 748?

Answer 1

Is that 1st ( = First) or LST?

If LST 748: [1]
"LST-748 was laid down on 2 April 1944 at Pittsburgh, Pa., by the Dravo Corp., Neville Island; launched on 13 May 1944; ... During World War II, LST-748 was assigned to the Asiatic-Parific theater and participated in the Leyte landings in November 1944... Following the war, LST-748 performed occupation duty in the Far East and saw service in China until mid-March 1946... LST-748 earned two battle stars for World War II service."

If 748 airplane: [2]
"The Avro 748 was a small short-range turboprop airliner designed by Avro in the late 1950s as a replacement for the now-aged DC-3's... Avro concentrated on performance, notably for STOL operations, and found a dedicated market and 380 aircraft were built...The first aircraft flew from Avro's Woodford plant on June 24, 1960, ... Eighteen 748 Series 1 aircraft were produced, the first for British Skyways Coach-Air..."

Or maybe you mean motorcycles:
Ducati makes a model 748, but I don't know when the first was made. Sorry.

If that doesn't do the trick, please give a little more info.

Answer 2

On its maiden flight one of its wings fell off, hence the beginning of the first 747.